Data Stores

Historian Data stores are stored archive files that contain data gathered from all data sources during a specific period of time. You can write and read data from the archives available under the data stores. Using data stores, you can store, organize, and manage tags according to the data source and storage requirements.

You can define two types of data stores:

Historical Data Store Tags stored in a historical data store will store data as long as disk space is available. For more information, refer to Data Store Options Tab. The maximum number of Historical data stores supported depends on the license.
SCADA Buffer Data Store Tags stored under SCADA buffer data store will store data for a specific duration of time based on license. For more information, refer to Data Store Options Tab.

When you install Historian 6.0 or higher, the following two historical data stores are installed by default:

System Stores Historian messages and performance tags. This is only for internal usage within Historian, and you cannot add tags to this data store. Note that you cannot rename or delete a System data store. You cannot rename or delete a System data store.
User Stores data for the tags. This is a default data store. You can rename and delete this user data store as long as there is another data store available. Note that you cannot delete the last user data store.

Note: Additionally, based on your license, a SCADA Buffer data store is also installed. It stores short term tags and data in a SCADA Historian. Based on your license, you can create multiple historical data stores. The maximum number of Historical data stores supported depends on the license.